7/10 - 1/5 = (7/10) - (2/10) = 5/10 = 1/2

(1/4 - 1/12) 5 = (3/12 - 1/12) 5 = (2/12) * 5 = 10/12 = 5/6

Therefore, the answer is: 1/2, 5/6